cast-iron

a cast-iron promise or arrangement is one that can be trusted completely (always before noun) No new business comes with a cast-iron guarantee of success.

Common Names:

Name	Pronounced	Usage
Amabel	['æməbel]
Aygul	-	Azerbaijani, Uyghur
Serhat	-	Turkish
Davison	['deivisn]
Glyndwr	-	Welsh
Jowan	-	Cornish